Questions tagged [cache]

An intermediate data storage area with high performance but limited capacity. The term "cache" can refer to hardware cache (on a processor) or software cache (which stores commonly used values in a computer's memory).

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181
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10answers
251k views

Refresh Icon Cache Without Rebooting

Normally, to refresh the icon cache in Windows, we have to reboot. Is there a way to refresh the icon cache in Windows 7/8 without rebooting?
60
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10answers
111k views

How can I use my small SSD as a cache for a larger hard disk?

I would like to use a (small) SSD disk as a cache for a large hard disk. I realize there are hardware-based products that do this: HighPoint RocketHybrid HBA, Intel SmartResponse and others. There is ...
57
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3answers
25k views

Keep GnuPG credentials cached for entire user session

GnuPG can, with gpg-agent, cache access to a private key. How can I keep that cache active for the entire user session? When I unlock the key for gpg-agent, it only stays cached for a limited time. ...
39
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1answer
74k views

How to increase VLC RAM buffer for offline files?

I would like to configure VLC player to preload a significant portion (like a hundred megabytes or so) of a video file from the hard disk to RAM before playing it. Is this possible?
30
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3answers
115k views

How often does the DNS cache clear?

How often does the DNS cache clear on a Windows 7 machine?
30
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2answers
19k views

Manually flushing write cache on Windows

On *nix systems, a user can use the sync command to force any pending writes in the kernel's disk cache to be flushed to disk. Does Windows have a similar command?
30
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4answers
31k views

How do I stop Chrome sending Cache-control: max-age=0 when I hit enter?

I'm on a slightly flaky connection and I'm trying to improve my browsing experience with the use of a local proxy. According to my research, however, if I hit 'enter' in my browser on an existing URL,...
27
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3answers
66k views

How do I turn off caching in IIS7?

I'm developing an ASP classic site under Windows 7 (form a queue ladies). The problem is IIS seems to be heavily making use of its cache for both static and dynamic content which really conflicts with ...
24
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2answers
27k views

RamMap “Empty standby list” drastically speeds up PC. Is there a better way to do this?

Many people are educated on how Windows Memory manager caching works by reading Microsoft white papers, etc. However, there are relatively few documents that describe real-world performance issues (...
21
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6answers
5k views

Can we run linux in something faster than RAM?

This is perhaps a silly question, and may be the result of a misunderstanding. I'm studying CPU's right now, and memory in particular. I was just reading about how much faster SRAM is than DRAM but ...
21
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5answers
31k views

How to clear cached redirects in Chrome

How do you clear cached redirects in Chrome? I changed the DNS for a domain name and when I go to mydomain.com. Even though ping mydomain.com now shows it resolves to the correct IP, if I type in "...
20
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2answers
19k views

How can I determine the current size of the ARC in ZFS, and how does the ARC relate to free or cache memory?

ZFS uses an ARC (adaptive replacement cache) which is not accounted for in the traditional Linux "cache" memory usage. How can I determine the current size as well as size boundaries of the ZFS ARC, ...
20
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2answers
248k views

How do I clear the Recent Documents list in Windows 7? [duplicate]

Possible Duplicate: Clear cache/history in Windows 7? How do I remove the list of recent files in Windows 7? Are those files stored anywhere else?
19
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3answers
63k views

How to increase the disk cache of Windows 7

Under Windows 7 (64 bit), I'm reading through 9000 moderately sized files. In total, there is more than 200 MB of data. Using Java (JDK 1.6.21) I'm iterating over the files. The first 1400 or so go ...
17
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3answers
58k views

How to disable caching in Internet Explorer 9?

How can i disable caching in Internet Explorer 9? i browse to a page, and click a link. When i click Back, i need the browser to always re-fetch the page from the web-site. i've tried disabling the ...
16
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1answer
8k views

What does the filesystem cache do in Windows 7?

The Diagnosing why Git is so slow article has this interesting item in it: Enable the filesystem cache Windows' filesystem layer is inherently different from Linux' (for which Git's filesystem ...
13
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2answers
25k views

L2 and L3 Cache Difference?

While I understand that the computer cache is: A CPU cache is a cache used by the central processing unit of a computer to reduce the average time to access memory. The cache is a smaller, faster ...
13
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6answers
52k views

Windows 7 kills VMWare performance by disk caching?

We're running Windows 7 Enterprise 64-bit SP1 on Dell Precision T3500's (Xeon E5630 @ 2.53GHz, 4GB of RAM). On top of this is VMWare Workstation 7.1.4, up to date. Running in a VM is Windows XP ...
12
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3answers
86k views

How to Move Offline Files Cache in Windows 7?

On Vista systems, I've been using these instructions to relocate the "Offline Files Cache" from its default location of c:\csc. Works great. However, these instructions do not work on Windows 7. ...
12
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4answers
36k views

What is the difference between a cache and a buffer?

Is saying a cache is a special kind of buffer correct? They both perform similar functions, but is there some underlying difference that I am missing?
12
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2answers
10k views

flush opera DNS cache

for a developer that has to update DNS entries to do testing and other tasks, how do you clear the DNS cache in Opera. Or lower the extremely long cache that get's in your way after editing /etc/...
12
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3answers
10k views

What does “Write cache buffer flushing” mean

As in the Windows 7 Disk Policy Options: [x] Enable Write Caching on the device [ ] Turn off Windows write-cache buffer flushing on the device Is the first the cache on the physical disk, and the ...
12
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2answers
7k views

Is the L3 cache shared by all cores for a Sandy-Bridge E Xeon CPU?

In a related question I asked about the benefit of a dual-CPU system in terms of doubling the L3 cache. However, I have noticed that the Xeon E5-2600 series of CPU's has exactly 2.5 MB of L3 cache ...
12
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3answers
12k views

How to stop ReadyBoost from rebuilding cache after every restart on SD cards and flash drives?

On my computers (running windows 7 and vista and using SD cards and flash drives) ReadyBoost rebuilds cache after every reboot. Because of this and 5400RPM HDD, it takes several minutes for computer ...
12
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2answers
10k views

Prevent Caching in Windows FTP (Explorer)

Windows Explorer's FTP functionality appears to be caching downloaded files, such that when I drag drop (to download) the same file again, it's not downloading the latest version from the FTP server. ...
11
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1answer
23k views

Whats the difference between physical and virtual cache?

I am having trouble understanding what virtual cache actually is. I understand virtual memory. If the CPU wants to access memory, as far as I understand, it sends a virtual address to the MMU which, ...
11
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3answers
23k views

Do Solid State Disks (SSDs) have a buffer cache?

All HDDs that I know have at least 8MB or more of buffer cache (I know that it is for increasing read and write performance on Disk Drivers). However, I'm just curious: Do SSDs have any buffer/cache ...
11
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4answers
5k views

To what extent is size a factor in SSD performance?

To what extent is the size of an SSD a factor in its performance? In my mind, correct me if I'm wrong, a bigger SSD should be, everything else being equal, faster than a smaller one. A bigger SSD ...
10
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1answer
6k views

How to clear Chocolatey cache in the free version?

Installation-file-cleaning is currently only available in the licensed edition of Chocolatey ($96 a year) and the developers seemingly have no plans to offer cache-cleaning support for the free ...
10
votes
5answers
95k views

Why does remote desktop not work for me by computer name, and only by IP?

I have a computer at work that I can only connect to remotely when using the computer's IP address and not when using the computer's name. I can see my computer name is set up correctly as "JoshPC" (...
10
votes
5answers
42k views

No Accelerate button/tab on Intel Rapid Storage window

I have an ASUS P8Z68 motherboard with a Corsair SSD as my primary boot drive. I have a TB standard hard drive as a secondary data drive. I am attempting to use an older Intel SSD as a cache on the ...
10
votes
1answer
3k views

Where should I put my application cache for Unix based apps?

I am building command line application, and I have a need to save some temp data to files. I do not know where is convention for applications to store their cache on unix based systems (in this case ...
10
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1answer
30k views

VLC Caching levels

When I open the Preferences of VLC and go to Input & Codecs, I have a setting called Default Caching Level. I can choose between Cusom Lowest latency Low latency Normal High latency Higher ...
9
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4answers
16k views

Disable linux read and write file cache on partition

How do i disable the linux file cache on a xfs partition (both read an write). We have a xfs partition over a hardware RAID that stores our RAW HD Video. Most of the shoots are 50-300gb each so the ...
9
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2answers
16k views

Difference between Ctrl+Refresh and Ctrl+Shift+Refresh?

I understand that Ctrl + Refresh fetches fresh content from browser without reading the cache. Then what is Ctrl + Shift + Refresh for? Ctrl + Refresh request header are like this: Cache-Control : ...
9
votes
1answer
6k views

Which files are cached by linux?

I understand that linux uses unused RAM to keep some files cached. But I wonder, which files it actually caches! If you take a look at free : Gesamt Belegt Frei Gemeinsam Puffer Cached Speicher: ...
9
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4answers
49k views

How could I limit or even disable file cache on Windows Server 2008R2?

There is a machine, with a very fast RAID array, and a fast internet connection. But, it only got 8gb of mem, which runs out really quick, when the upload goes up. Any ideas how could I disable, or ...
9
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2answers
13k views

Is there a way to reset Windows file cache?

When an application reads a file from a media, the first time the timing is significant as the file is indeed read, sometimes several minutes. But with subsequent reads, it only takes a few seconds ...
9
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4answers
3k views

How long does data stay in a RAID cache?

Most higher-end RAID cards have the option to purchase a battery add-on to allow the controller to finish writing the contents of the cache to the drives in the event of a power failure. I setup ...
9
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3answers
1k views

Xeon vs overclocked i7 Extreme for lowest latency

I am aware that the differences between high-end i7 and Xeon are: compatibility with dual socket motherboards, total L2/L3 cache size. overclocking capability. extra cores - Haswell i7-...
8
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6answers
18k views

Clear Windows “Run” box cache

One thing that I use almost every minute is the Windows Run box (WINDOWS+R). It let's you type a path and auto-completes it really quickly so that you can jump to any dir in no time. My problem is ...
8
votes
3answers
32k views

Clearing Cache in Mail on Snow Leopard

Can anyone tell me how to clear the cache in the Mail application on Snow Leopard? I noticed that it was automatically backing up my gmail messages so it ended up caching 11GB of emails even though ...
8
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3answers
36k views

How to clear cached memory in Debian?

If I run a free -m, I get this output: Is there a command that I could use to clear the used memory? I have tried this: echo 1 > /proc/sys/vm/drop_caches It will ask for sudo. But even after ...
8
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5answers
2k views

SSD cache to minimize HDD spin-up time?

short version first: I'm looking for Linux compatible software which is able to transparently cache HDD writes using an SSD. However, I only want to spin up the HDD once or twice a day (to write the ...
8
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2answers
12k views

What to put on RAMDisk on Windows?

I got a lot of RAM installed in my PC recently and I looked into this RAMDisk thing. There are two things I've found from my investigation: You should not mess with Windows native pagefile/memory ...
8
votes
4answers
29k views

Turn off Linux file cache

How do I turn off write cache in Linux? More specifically, SUSE 11? My problem is that heavy I/O kills the system even if the generating process is a user priority class, and the starved processes ...
8
votes
2answers
4k views

Windows: Disable caching of large files

I am currently dealing with very large video files, including de/encoding them and copying them around etc. To my surprise Windows attempts to cache these video files, even though there is no point ...
8
votes
1answer
9k views

How to clear locally cached OneDrive online-only files

I recently needed to free up some space on my Dell Venue 8 Pro, running Windows 8.1, and realized that I had OneDrive set for all files to be available offline, meaning it was caching local copies of ...
8
votes
1answer
23k views

Best way to clean up Windows Installer cache?

Whats the "safest" way to clean up large files in the Windows Installer cache? Is deleting the files the only way, or is there a better way to "unregister" the cached files or something?
8
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0answers
394 views

How do I evaluate an SSD caching solution for home desktop use? [closed]

I've got a 30GB SSD that I would love to start using as a cache for my larger HDDs. I primarily want to improve apparent performance for general desktop use. I do the occasional massive DB migration ...

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